Quote - Thanks for the replies on the glass issue. I do have the texture in the transmission slot with a reflection of 246 across the board and architectual as the glass setting.

I hadn't thought about doing the plane for it! Good idea! I ended up frosting it for the time being as I tried a few other things in the mean time with the same results. I do plan on doing a fog prop version, so I'll add the plane for the next round

I'm not sure if I'm going to put this right but this is what occurs to me...

Is it possible that your glass object is using the same surface for the front and back of the pane? Thus you are in fact puting the letters on both sides as byproduct of how the object is made? If so the plane in front is going to be the safest way to do it, or finding a window made differently.